Spin Lock vs Mutex vs Binary Semaphore vs Counting Semaphore in Operating System

[@ManolyaATALAY]

thanks for making this video! it cleared a lot in my head.

[@Amritanjali]

then what is use of binary semaphor??

[@practicalcsjourney]

Not much use as such.

[@sauravnegi8858]

bhai notes mil sakte h ye?

[@focusman8801]

if semaphore is not able to do mutual exclusion then how can it helps in process synchronization ??

[@ManolyaATALAY]

as far as I know #1 it is an older model, #2: they can actually do the mutual exclusion at kernel level but keeping track of threads all over the place can be heinous work. You need additional methods to support the synchronization. Still, its lock system works to some extent, with TSL instructions in the case of multi-core systems. TSL lock provides protection to semaphores. Though, I should note that my knowledge is completely theoretic on my part. There might be better details in Tanenbaum's OS book.

[@sahilkalamkar5332]

But if we initialize semaphore to a value of 1...It can be used to solve the Critical section problem right?

[@practicalcsjourney]

Not exactly. In semaphore, the lock can be acquired by one thread and released by another.

[@inspirationalthing]

Can u give any c example to understand this all concept

[@utsavaggarwal_ds]

So u mean to say , if u use mutex as a solution then the waiting process will sleep till the process exit CS, but it does not have any impact on the total execution time. right ?

[@practicalcsjourney]

In case of mutex, the waiting process will sleep and it will have impact on total running time since context switch is involved when any process sleeps. After context switch, processor will be able to run some other process. So, its kind of tradeoff.

[@vishnusainadh7656]

can you provide your mail id ?

[@practicalcsjourney]

[e-mail]

[@randomyt5358]

Bogus explaination

[@premac3960]

Please improve your teaching skills.